linux-kernel - Re: [PATCH v4.4-rc8 6/7] isdn: eicon: diddfunc: Silence frame size warning

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Date:	Fri, 8 Jan 2016 23:04:11 +0300
From:	Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
To:	tim.gardner@...onical.com, Armin Schindler <mac@...ware.de>,
	Karsten Keil <isdn@...ux-pingi.de>, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4.4-rc8 6/7] isdn: eicon: diddfunc: Silence frame size
 warning

Hello.

On 01/08/2016 03:32 PM, tim.gardner@...onical.com wrote:

> From: Tim Gardner <tim.gardner@...onical.com>
>
> drivers/isdn/hardware/eicon/diddfunc.c: In function 'connect_didd':
> drivers/isdn/hardware/eicon/diddfunc.c:77:1: warning: the frame size of 1152 bytes is larger than 1024 bytes [-Wframe-larger-than=]
>
> gcc version 5.3.1 20151219 (Ubuntu 5.3.1-4ubuntu1)
>
> Cc: Armin Schindler <mac@...ware.de>
> Cc: Karsten Keil <isdn@...ux-pingi.de>
> Signed-off-by: Tim Gardner <tim.gardner@...onical.com>
> ---
>   drivers/isdn/hardware/eicon/diddfunc.c | 17 +++++++++++++----
>   1 file changed, 13 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/isdn/hardware/eicon/diddfunc.c b/drivers/isdn/hardware/eicon/diddfunc.c
> index b0b23ed..a9feb4f 100644
> --- a/drivers/isdn/hardware/eicon/diddfunc.c
> +++ b/drivers/isdn/hardware/eicon/diddfunc.c
> @@ -52,9 +52,13 @@ static int __init connect_didd(void)
>   	int x = 0;
>   	int dadapter = 0;
>   	IDI_SYNC_REQ req;
> -	DESCRIPTOR DIDD_Table[MAX_DESCRIPTORS];
> +	DESCRIPTOR *DIDD_Table;
>
> -	DIVA_DIDD_Read(DIDD_Table, sizeof(DIDD_Table));
> +	DIDD_Table = kcalloc(MAX_DESCRIPTORS, sizeof(*DIDD_Table), GFP_KERNEL);

   Previously the array didn't seem to be zeroed, perhaps it's better to use 
kmalloc_array()?

[...]

MHR, Sergei